print(r"\\\t\\\/")
print('''
hello   world
nihao''')

print('='*10)

print(r'''\n
hello   world
nihao''')

print('='*10)

print(10/3)
print(10//3)


print('='*10)
# ord函数只能获取单个字符
print(ord('A'))
print(chr(66))
print(ord('中'))
print(chr(25991))

print("="*10)
x=b'ABC'

str="中文".encode('utf-8')
print(str)
print(len(str))
print(str.decode('utf-8'))

print("hello %s, my name is %s " % ("world", "大聪明") )

print('Hello {0}, my age is {1:.1f}'.format('world', 25.6))
name="大聪明"
age=25.6
print(f"Hello {name}, my age is {age}")
